delphi编写的虚拟磁盘开发源码分析

1、Delphi编写的虚拟磁盘开发源码分析 一、虚拟光驱驱动（C语言编写）1、Vcd文件夹、DeviceThread.h/设备的处理线程VOIDDeviceThread (IN PVOID Con text)；、DeviceThread.c#in clude #in clude #in clude #in clude #i nclude #in clude #i nclude #in clude #in clude /NTSTATUSVCDOpe nFile (OBJECT_ATTRIBUTESFILE END OF FILE INFORMATIONFILE_BASIC_INFORMATIONFI

2、LE_STANDARD_INFORMATIONFILE_ALIGNMENT_INFORMATIONIN PDEVICE_OBJECTIN PIRP)PDEVICE_EXTENSIONPCHARUCHARUNICODE_STRINGNTSTATUSDeviceObject,Irpdevice_exte nsion;file name;afile_ nameMAX_PATH = 0 ufile_ name;status;object_attributes;file_eof;file_basic;file_sta ndard;file_alig nment;DbgPri nt(VCDOpe nFil

3、en);device_exte nsio n = (PDEVICE_EXTENSION) DeviceObject-DeviceExte nsio n;file name = (PCHAR)lrp-Associatedlrp.SystemBuffer;RtlCopyMemory(device_exte nsion- oldfile_ name,file name,MAX_PATH);if (file name0 = )if (file name1 = )/ serversharepathXXX.iso -?UNCserversharepathXXX.isostrcpy(afile_ name,

4、 ?UNC);strcat(afile_ name, file name);else/ DeviceHarddisk0Partiti on 1pathXXX.iso不变strcpy(afile_ name, file name);else/ c:pathXXX.iso -?c:pathXXX.isostrcpy(afile_ name, ?);strcat(afile_ name, file name);device_exte nsion-file_iname.Le ngth = (USHORT)strle n(afile_ name);device_exte nsion-file_ name

5、.MaximumLe ngth = device_exte nsion-file_ name.Le ngth;device_exte nsion-file_ name.Buffer=ExAllocatePool(N on PagedPool,device_exte nsion-file_ name.Le ngth);RtlCopyMemory(device_exte nsion-file _n ame.Buffer, afile_ name,device_exte nsion-file_ name.Le ngth );status = RtlA nsiStri ngTo Uni codeStr

6、i ng( &ufile_ name,&device_exte nsion-file_ name, TRUE);if (!NT_SUCCESS(status) ExFreePool(device_exte nsi on-file _n ame.Buffer); lrp-loStatus.Status = status;lrp-loStatus .In formati on = 0;return status;In itializeObjectAttributes(&object_attributes,&ufile_ name,OBJ_CASE_INSENSITIVE,NULL,NULL);st

7、atus = ZwCreateFile(&device_exte nsion-file_ha ndle,GENERIC_READ,&object_attributes,& lrp-loStatus,NULL,FILE_ATTRIBUTE_NORMAL,FILE_SHARE_READ,FILE_OPEN,FILE_NON_DIRECTORY_FILE | FILE_RANDOM_ACCESS |FILE_NO_INTERMEDIATE_BUFFERING |FILE_SYNCHRONOUS_IO_NONALERT,NULL,0);if (status = STATUS_OBJECT_NAME_N

8、OT_FOUND | status = STATUS_NO_SUCH_FILE)/如果长度是0ExFreePool(device_exte nsi on-file_ name.Buffer);RtlFree Uni codeStri ng(&ufile_ name);Irp-IoStatus.Status = STATUS_NO_SUCH_FILE;Irp-IoStatus .In formati on = 0;DbgPrint(” 文件不存在!n);return STATUS_NO_SUCH_FILE;else if (!NT_SUCCESS(status)ExFreePool(device

9、_exte nsi on-file _n ame.Buffer);RtlFree Uni codeStri ng(&ufile_iname);DbgPrint(”打开文件失败！n);return status;RtIFree Un icodeStri ng(&u file _n ame);/获取虚拟光盘文件基础信息status = ZwQueryl nformatio nFile(device_exte nsion-file_ha ndle,& lrp-loStatus,&file_basic,sizeof(FILE_BASIC_INFORMATION),FileBasic In format

10、i on);if (!NT_SUCCESS(status)ExFreePool(device_exte nsi on-file _n ame.Buffer);ZwClose(device_exte nsio n-file_ha ndle);DbgPri nt(1获取文件信息失败!n);return status;status = ZwQueryI nformatio nFile(device_exte nsion-file_ha ndle,& lrp-loStatus,&file_sta ndard,sizeof(FILE_STANDARD_INFORMATION),FileSta ndard

11、 In formatio n);if (!NT_SUCCESS(status)ExFreePool(device_exte nsi on-file _n ame.Buffer);ZwClose(device_exte nsio n-file_ha ndle);DbgPrint(2获取文件信息失败!n);return status;device_exte nsion-file_size.QuadPart = file_sta ndard.E ndOfFile.QuadPart;DbgPrint(文件长度%d!n,device_extension-file_size.QuadPart);statu

12、s = ZwQueryl nformatio nFile(device_exte nsion-file_ha ndle,& lrp-loStatus,&file_alig nment,sizeof(FILE_ALIGNMENT_INFORMATION),FileAlig nmen tl nformati on)；if (!NT_SUCCESS(status)ExFreePool(device_exte nsi on-file _n ame.Buffer);ZwClose(device_exte nsio n-file_ha ndle);DbgPrint(3获取文件信息失败!n); return

13、 status;DeviceObject-Alig nmen tRequireme nt = file_alig nmen t.Alig nmen tRequireme nt;/只读DeviceObject-Characteristics |= FILE_READ_ONLY_DEVICE;/媒体在光驱device_exte nsi on-media_in_device = TRUE;lrp-loStatus.Status = STATUS_SUCCESS;lrp-loStatus .In formatio n = 0;return STATUS_SUCCESS;NTSTATUSVCDClose

14、File(IN PDEVICE_OBJECT DeviceObject,IN PIRPIrp)PDEVICE_EXTENSION device_exte nsio n;DbgPri nt(VCDCloseFilen ”);ASSERT(DeviceObject != NULL);ASSERT(Irp != NULL);device_exte nsio n = (PDEVICE_EXTENSION) DeviceObject-DeviceExte nsio n;ExFreePool(device_exte nsi on-file _n ame.Buffer);ZwClose(device_ext

15、e nsion-file_ha ndle);device_exte nsion-media_in_device = FALSE;Irp-IoStatus.Status = STATUS_SUCCESS;lrp-loStatus .In formatio n = 0;return STATUS_SUCCESS;/VOIDDeviceThread (IN PVOID Con text)PDEVICE_OBJECT device_object;PDEVICE_EXTENSION device_exte nsi on;PLIST_ENTRYrequest;PIRPirp;PIO_STACK_LOCAT

16、ION io_stack;PUCHARsystem_buffer;PUCHARbuffer;DbgPri nt(DeviceThreadn);device_object = (PDEVICE_OBJECT) Con text;device_exte nsio n = (PDEVICE_EXTENSION) device_object-DeviceExte nsio n;必须如此才能保证对文件读写正常.否则核模式优先级别高的话写/把线程自身优先级设置较低文件会失败KeSetPriorityThread(KeGetCurre ntThread(), LOW_REALTIME_PRIORITY);f

17、or (;)/等待事件被触发KeWaitForSi ngleObject(&device_exte nsion- k_eve nt,Executive,KernelMode,FALSE,NULL);DbgPrint(KeWaitForSingleObject被触发 n);/如果线程结束标志被设置了，就结束自身if (device_exte nsion-termi nate_thread)PsTermi nateSystemThread(STATUS_SUCCESS);/解锁while (request = ExIn terlockedRemoveHeadList(&device_exte ns

18、ion-list_head,&device_exte nsion-list_lock)irp = CONTAINING_RECORD(request, IRP, Tail.Overla y.L istE ntry);io_stack = IoGetCurre ntlrpStackLocati on (irp);DbgPri nt(io_stack-MajorFu nctio n=%un,io_stack-MajorFu nctio n);switch (io_stack-MajorF un ctio n)/读case IRP_MJ_READ:system_buffer = (PUCHAR) M

19、mGetSystemAddressForMdlSafe(irp-MdlAddress, NormalPagePriority);if (system_buffer = NULL)irp-loStatus.Status = STATUS_INSUFFICIENT_RESOURCES;irp-IoStatus .In formatio n = 0;break;buffer = (PUCHAR) ExAllocatePool(PagedPool, io_stack-Parameters.Read.Le ngth);if (buffer = NULL)irp-loStatus.Status = STA

20、TUS_INSUFFICIENT_RESOURCES;irp-IoStatus .In formatio n = 0;break;ZwReadFile(device_exte nsion-file_ha ndle,NULL,NULL,NULL,&i rp-IoStatus,buffer,io_stack-Parameters.Read.Le ngth,& o_stack-Parameters.Read.ByteOffset,NULL);RtlCopyMemory(system_buffer, buffer, io_stack-Parameters.Read.Le ngth);ExFreePoo

21、l(buffer);break;/写，直接返回写保护case IRP_MJ_WRITE:irp-loStatus.Status = STATUS_MEDIA_WRITE_PROTECTED;break;/设备控制case IRP_MJ_DEVICE_CONTROL:switch (io_stack-Parameters.DeviceloC on trol.IoC on trolCode)/我们定义的打开文件case IOCTL_VCD_OPEN_FILE:SeImpers on ateClie nt(device_exte nsion-security_clie nt_con text, NU

22、LL);irp-loStatus.Status = VCDOpe nF ile(device_object, irp);DbgPri nt(VCDOpe nFile=%un ,irp-loStatus.Status);PsRevertToSelf();DbgPri nt(PsRevertToSelfn);break;/我们定义的关闭文件case IOCTL_VCD_CLOSE_FILE:irp-loStatus.Status = VCDCloseFile(device_object, irp);break;default:irp-loStatus.Status = STATUS_DRIVER_

23、INTERNAL_ERROR;break;default:irp-loStatus.Status = STATUS_DRIVER_INTERNAL_ERROR;loCompleteRequest(irp,(CCHAR) (NT_SUCCESS(irp-loStatus.Status) ?IO_DISK_INCREMENT IO_NO_INCREMENT);、VCD.h#ifndef _VCD_#defi ne _VCD_ #ifndef T#ifdef _NTDDK_#defi ne _T(x)L # x#else#defi ne _T(x)x#en dif#en dif#ifndef _T

24、#defi ne _T(x) #en dif_T(x)#defi ne DEVICE_BASE_NAME#defi ne DEVICE_DIR_NAME#defi ne DEVICE_FULL_NAME_T(VCD)_T(Device)DEVICE_BASE_NAMEDEVICE_DIR_NAME DEVICE_BASE_NAME#defi ne DEVICE_VCD0 x8000II打开文件#defi neIOCTL_VCD_OPEN_FILEFILE_READ_ACCESS | FILE_WRITE_ACCESS)II关闭文件#defi neIOCTL_VCD_CLOSE_FILEFILE

25、_READ_ACCESS | FILE_WRITE_ACCESS)II查询设备信息CTL_CODE(DEVICE_VCD, 0 x800,CTL_CODE(DEVICE_VCD, 0 x801,METHOD_BUFFERED,METHOD_BUFFERED,METHOD_BUFFERED,#defi ne IOCTL_VCD_QUERY_DEVICE CTL_CODE(DEVICE_VCD,0 x802,FILE_READ_ACCESS)#defi ne MAX_PATH260#defi ne DWORD un sig ned long#defi ne WORD un sig ned shor

26、t#defi ne BOOL un sig ned long#defi ne BYTE un sig ned charI*II虚拟光驱文件信息typedef struct _VCD_FILE_INFORMATION LARGE_INTEGER FileSize;II 文件大小UCHARFileNameMAX_PATH;II 文件名 VCD_FILE_INFORMATION, *PVCD_FILE_INFORMATION;*III设备的信息typedef struct _VCD_DEVICE_INFORMATION VCD设备ULONGMagic;II标示，符和这个标示就认为是ULONGVers

27、ion;II版本ULONGIn dex;II设备序号BOOLMedia In;II设备中是否有媒体UCHARFileNameMAX_PATH;II文件名UCHARDescaptio nMAX_PATH;II设备描述VCD_DEVICE_INFORMATION, *PVCD_DEVICE_INFORMATION;#defi ne DEVICE_MAGICOxAAFFFFAA#defi ne DEVICE_VERSIONOxOOOOOOOlII创建多少个 CDROM设备,我定为4个.#defi ne DEVICE_COUNT0 x4II驱动对象扩展信息typedef struct _DEVICE_

28、EXTENSION ULONGBOOLEANHANDLEUCHARANSI_STRINGLARGE_INTEGERPSECURITY CLIENT CONTEXTLIST_ENTRY KSPIN LOCKKEVENTPVOIDBOOLEANin dex; media_in_device;file_ha ndle;oldfile_ nameMAX_PATH; file_ name; file_size;security_clie nt_con text;list_head;list_lock;k_eve nt; thread_po in ter;termi nate_thread;II设备的ID

29、II设备里是否有媒体II文件句柄II传进来的原始文件名II文件名II文件大小II客户端安全上下文II线程ListII线程锁II事件句柄II线程对象指针II线程是否已经终止 DEVICE_EXTENSION, *PDEVICE_EXTENSION;II目录设备 Device的句柄 extern HANDLE device_root_ha ndle;#defi ne SECTOR_SIZE512#defi ne TOC_DATA_TRACK0 x04II入口NTSTATUSDriverE ntry(IN PDRIVER_OBJECT DriverObject,IN PUNICODE_STRING

30、RegistryPath );IIII创建CDROM设备NTSTATUSIoCreateCDROMDevice(IN PDRIVER_OBJECT DriverObject,IN ULONGNumber);NTSTATUSIrpCreateClose (IN PDEVICE_OBJECT DeviceObject,IN PIRPIrp);VOIDIrpUn load (IN PDRIVER_OBJECT DriverObject);NTSTATUSlrpReadWrite(IN PDEVICE_OBJECT DeviceObject,IN PIRPIrp);NTSTATUSIrpDeviceC

31、 on trol(IN PDEVICE_OBJECT DeviceObject,IN PIRPIrp);#en dif、VCD.c#in clude #in clude #in clude #in clude #in clude #i nclude #i nclude #in clude #in clude #i nclude HANDLE device_root_ha ndle;NTSTATUSDriverEntry (IN PDRIVER_OBJECT DriverObject,IN PUNICODE_STRING RegistryPathNTSTATUSinti;UNICODE_STRI

32、NGOBJECT_ATTRIBUTESstatus = STATUS_SUCCESS;object_attributes;device_dir_ name;DbgPri nt(lrpU nl oadn);/创建设备目录 DeviceRtlI ni tU nicodeStri ng(&device_dir_name, DEVICE_DIR_NAME);In itializeObjectAttributes(&object_attributes,&device_dir_ name,OBJ_PERMANENT,NULL,NULL);status = ZwCreateDirectoryObject(&

33、device_root_ha ndle,/全部能力DIRECTORY_ALL_ACCESS,&object_attributes);if (!NT_SUCCESS(status)DbgPri nt(ZwCreateDirectoryObject Failedn);return status;/创建临时对象ZwMakeTemporaryObject(device_root_ha ndle);for (i=0;iMajorFu nctio nIRP_MJ_CREATEDriverObject-MajorFu nctio nIRP_MJ_CLOSE=IrpCreateClose;DriverObje

34、ct-MajorFu nctio nIRP_MJ_READDriverObject-MajorFu nctio nIRP_MJ_WRITE=IrpReadWrite;DriverObject-MajorFu nctio nIRP_MJ_DEVICE_CONTROL = IrpDeviceC on trol;DriverObject-Driver Un load = IrpUn load;return STATUS_SUCCESS; /创建CDROM设备，每个设备都会有一个处理线程NTSTATUSloCreateCDROMDevice(IN PDRIVER_OBJECT DriverObject

35、,IN ULONGNumber)NTSTATUSWCHARUNICODE_STRINGANSI_STRINGPDEVICE_OBJECTstatus = STATUS_SUCCESS;device_ name_buferMAXIMUM_FILENAME_LENGTH = 0;device_ name;adevice_ name;device_object;PDEVICE_EXTENSIONdevice_exte nsi on;HANDLEthread_ha ndle;swpri ntf(device_ name_buffer,DEVICE_FULL_NAME L% u,Number);RtlI

36、 nit Un icodeStri ng(&device_ name, device _n ame_buffer);Rtl Un icodeStri ngToA nsiStri ng(&adevice_ name, & device _n ame, TRUE);DbgPri nt(adevice_ name:%sn, adevice_ name.Bufer);RtlFreeA nsiStri ng(&adevice _n ame);status = IoCreateDevice(DriverObject, sizeof(DEVICE_EXTENSION), &device_ name, FIL

37、E_DEVICE_CD_ROM,0,FALSE,&device_object)；if (!NT_SUCCESS(status)DbgPri nt(loCreateDevice Failed!n ”);return status;device_object-Flags |= DO_DIRECT_IO;device_exte nsion = (PDEVICE_EXTENSION) device_object-DeviceExte nsio n;device_exte nsion-in dex = Number;device_exte nsi on-media_in_device = FALSE;d

38、evice_object-Characteristics |= FILE_READ_ONLY_DEVICE; /CDROM 只能是只读的/初始化线程ListIn itializeListHead(&device_exte nsio n-list_head);/初始化自旋锁Keln itializeSpi nLock(&device_exte nsi on-list_lock);/初始化事件KeI nitializeEve nt(&device_exte nsion-k_event,Synchroni zatio nEvent,FALSE);device_exte nsi on-termi na

39、te_thread = FALSE;/创建系统线程status = PsCreateSystemThread(&thread_ha ndle,(ACCESS_MASK) 0L,NULL,NULL,NULL,DeviceThread,device_object);if (!NT_SUCCESS(status)IoDeleteDevice(device_object);DbgPri nt(PsCreateSystemThread Failed!n);return status;status = ObRefere nceObjectByHa ndle(thread_ha ndle,THREAD_AL

40、L_ACCESS,NULL,KernelMode,&device_exte nsion-thread_po in ter, NULL);if (!NT_SUCCESS(status)ZwClose(thread_ha ndle);device_exte nsi on-termi nate_thread = TRUE;KeSetEve nt(&device_exte nsion- k_eve nt,(KPRIORITY) 0,FALSE);loDeleteDevice(device_object);DbgPrint(ObReferenceObjectByHandle Failed!n); ret

41、urn status;ZwClose(thread_ha ndle);return STATUS_SUCCESS;ntifs.h#defi ne TOKEN_SOURCE_LENGTH 8typedef en um _TOKEN_TYPE Toke nPrimary = 1,Toke nl mpers on ati on TOKEN_TYPE;typedef struct _TOKEN_SOURCE CCHAR SourceNameTOKEN_SOURCE_LENGTH;LUIDSourceIde ntifier; TOKEN_SOURCE, *PTOKEN_SOURCE;typedef st

42、ruct _TOKEN_CONTROL LUIDToke nld;LUIDAuthe nticati onld;LUIDModifiedld;TOKEN_SOURCE Toke nSource; TOKEN_CONTROL, *PTOKEN_CONTROL;typedef struct _SECURITY_CLIENT_CONTEXT SECURITY_QUALITY_OF_SERVICE SecurityQos;PACCESS_TOKENClie ntToke n;BOOLEANDirectlyAccessClie ntToke n;BOOLEANDirectAccessEffectiveO

43、 nly;BOOLEANServerIsRemote;TOKEN_CONTROLClie ntToke nCon trol; SECURITY_CLIENT_CONTEXT, *PSECURITY_CLIENT_CONTEXT; TOC o 1-5 h z #defi ne PsDerefere ncelmpers on atio nToke n(T)if (ARGUMENT_PRESENT(T) (ObDereferenceObject(T); else ; #defi ne PsDerefere ncePrimaryToke n(T) (ObDerefere nceObject(T)NTK

44、ERNELAPIVOIDPsRevertToSelf (VOID);NTKERNELAPINTSTATUSSeCreateClie ntSecurity (IN PETHREADThread,IN PSECURITY_QUALITY_OF_SERVICE QualityOfService,IN BOOLEANRemoteClie nt,#defi ne SeDeleteClie ntSecurity(C)OUT PSECURITY_CLIENT_CONTEXT Clie ntCo ntext );if (SeToke nType(C)-Clie ntToke n) = Toke nPrimar

45、y) PsDerefere ncePrimaryToke n( (C)-Clie ntToke n ); else PsDerefere ncelmpers on ati on Toke n( (C)-Clie ntToke n ); NTKERNELAPIVOIDSelmpers on ateClie nt (IN PSECURITY_CLIENT_CONTEXT Clie ntC on text,IN PETHREADServerThread OPTIONAL);NTKERNELAPITOKEN_TYPESeTokenType (IN PACCESS_TOKEN Toke n);Irp.c

46、#in clude #in clude #in clude #in clude #in clude #i nclude #i nclude #in clude #in clude #i nclude /PDEVICE_OBJECTCDROMDeleteDevice (IN PDEVICE_OBJECT DeviceObject )PDEVICE_EXTENSION device_exte nsio n; PDEVICE_OBJECTn ext_device_object;DbgPri nt(CDROMDeleteDevicen);ASSERT(DeviceObject != NULL);dev

47、ice_exte nsio n = (PDEVICE_EXTENSION) DeviceObject-DeviceExte nsio n;device_exte nsi on-termi nate_thread = TRUE;KeSetEve nt(&device_exte nsion- k_eve nt,(KPRIORITY) 0,FALSE);KeWaitForSi ngleObject(device_exte nsion-thread_po in ter,Executive,KernelMode,FALSE,NULL);ObDerefere nceObject(device_exte n

48、sio n-thread_poi nter);if (device_exte nsion-security_clie nt_con text != NULL)SeDeleteClie ntSecurity(device_exte nsio n-security_clie nt_con text); ExFreePool(device_exte nsion-security_clie nt_con text);n ext_device_object = DeviceObject-NextDevice;IoDeleteDevice(DeviceObject);return n ext_device

49、_object;/VOIDIrpUn load (IN PDRIVER_OBJECT DriverObject)PDEVICE_OBJECT device_object;DbgPri nt(IrpU nl oadn);device_object = DriverObject-DeviceObject;while (device_object)device_object = CDROMDeleteDevice(device_object);ZwClose(device_root_ha ndle);NTSTATUSIrpCreateClose (IN PDEVICE_OBJECT DeviceOb

50、ject,IN PIRPIrp)DbgPri nt(lrpCreateClosen); lrp-loStatus.Status = STATUS_SUCCESS; lrp-loStatus.l nformation = FILE_OPENED;IoCompleteRequest(Irp, IO_NO_INCREMENT);return STATUS_SUCCESS;NTSTATUSIrpReadWrite (IN PDEVICE_OBJECT DeviceObject,IN PIRPIrp)PDEVICE_EXTENSION device_exte nsio n;PIO_STACK_LOCAT

51、ION io_stack;DbgPri nt(lrpReadWriten);device_exte nsio n = (PDEVICE_EXTENSION) DeviceObject-DeviceExte nsio n;/如果没有媒体在光驱中就结束if (!device_exte nsion-media_in_device)Irp-IoStatus.Status = STATUS_NO_MEDIA_IN_DEVICE;Irp-IoStatus .In formati on = 0;IoCompleteRequest(Irp, IO_NO_INCREMENT);return STATUS_NO_

52、MEDIA_IN_DEVICE;io_stack = loGetCurre ntlrpStackLocati on (Irp);/如果长度=0if (io_stack-Parameters.Read.Le ngth = 0)Irp-IoStatus.Status = STATUS_SUCCESS;Irp-IoStatus .In formati on = 0;loCompleteRequest(lrp, IO_NO_INCREMENT);return STATUS_SUCCESS;loMarklrpPe ndi ng(lrp);ExIn terlockedl nsertTailList(&de

53、vice_exte nsion-list_head,& lrp-Tail.Overlay.ListE ntry,&device_exte nsion-list_lock);/触发事件KeSetEve nt(&device_exte nsion- k_eve nt,(KPRIORITY) 0,FALSE);return STATUS_PENDING;NTSTATUSIrpDeviceC on trol (IN PDEVICE_OBJECT DeviceObject,IN PIRPIrp)PDEVICE_EXTENSION device_exte nsio n;PIO_STACK_LOCATION

54、 io_stack;NTSTATUSstatus;DbgPri nt(IrpDeviceC on troln);device_exte nsio n = (PDEVICE_EXTENSION) DeviceObject-DeviceExte nsio n;io_stack = loGetCurre ntlrpStackLocati on (Irp);/如果没有媒体，并且不是打开文件或者查询设备信息的请求就不处理if (!device_exte nsi on-media_in_device) &(io_stack-Parameters.DeviceIoC on trol.IoC on trolC

55、ode !=IOCTL_VCD_OPEN_FILE )&(io_stack-Parameters.DeviceIoCo ntrol.loC on trolCode !=IOCTL_VCD_QUERY_DEVICE)Irp-IoStatus.Status = STATUS_NO_MEDIA_IN_DEVICE;lrp-loStatus .In formati on = 0;loCompleteRequest(lrp, IO_NO_INCREMENT);return STATUS_NO_MEDIA_IN_DEVICE;/处理请求switch (io_stack-Parameters.Devicel

56、oC ontrol.loCon trolCode)/打开case IOCTL_VCD_OPEN_FILE:SECURITY_QUALITY_OF_SERVICE security_quality_of_service;DbgPri nt(IOCTL_VCD_OPEN_FILEn);/如果有媒体if (device_exte nsi on-media_in_device)status = STATUS_INVALID_DEVICE_REQUEST;Irp-IoStatus .In formatio n = 0;DbgPrint(里面有光盘!n); break;/如果参数不够长if (io_sta

57、ck-Parameters.DeviceIoC on trol.l nputBufferLe ngth IoStatus .In formatio n = 0;DbgPrint(缓冲区不够长!n); break;/客户端安全的上下文if (device_exte nsion-security_clie nt_con text != NULL)DbgPrint(去掉客户端安全上下文!n);SeDeleteClie ntSecurity(device_exte nsio n-security_clie nt_con text);elseDbgPrint(创建客户端安全上下文 !n);device_

58、exte nsion-security_clie nt_con text =ExAllocatePool(No nPagedPool, sizeof(SECURITY_CLIENT_CONTEXT);RtlZeroMemory(&security_quality_of_service, sizeof(SECURITY_QUALITY_OF_SERVICE);security_quality_of_service 丄en gth = sizeof(SECURITY_QUALITY_OF_SERVICE); security_quality_of_service .Im pers on ati o

59、n Level = SecurityImpers on ati on; security_quality_of_service.C on textTracki ngMode = SECURITY_STATIC_TRACKING; security_quality_of_service.EffectiveO nly = FALSE;SeCreateClie ntSecurity(PsGetCurre ntThread(),&security_quality_of_service,FALSE,device_exte nsion-security_clie nt_con text);loMarklr

60、pPe ndi ng(Irp);ExI nterlockedI nsertTailList(&device_exte nsion-list_head,&Irp-Tail.Overlay.ListE ntry,&device_exte nsion-list_lock);KeSetEve nt(&device_exte nsion-k_event,(KPRIORITY) 0,FALSE);status = STATUS_PENDING;break;/如果是关闭文件case IOCTL_VCD_CLOSE_FILE:DbgPri nt(IOCTL_VCD_CLOSE_FILEn ”);IoMarkI